The phrase "right one's alley" is used to describe something that is suitable or well-matched to a person's preferences or interests. There are several synonyms for this expression, including "up one's alley," "in one's wheelhouse," "in one's strike zone," "within one's comfort zone," "in one's sphere," and "up one's street." Each of these phrases conveys the idea of something being a good fit for a person, and can be used interchangeably with "right one's alley" depending on the context. These expressions are commonly used to describe anything from hobbies to job opportunities to food preferences.